Cal. Health & Safety Code § 113095
A pet food ingredient or processed pet food shall be deemed to be misbranded:
(c) If in package form, unless it bears a label containing (1) the name and place of business of the manufacturer, packer, or distributor; and (2) an accurate statement of the quantity of the contents in terms of weight, measure or numerical count.
Under clause (2) of subdivision (c), reasonable variation shall be permitted, and exemptions as to small packages shall be established, by regulations prescribed by the department.